Look for a string object from a list in another list

I am doing a little project in which my program unscrambles a string and finds every possible combination of it.

I have two lists; comboList and wordList. comboList holds EVERY combination of the word; for example, the comboList for 'ABC' is:

['ABC','ACB','BAC','BCA','CAB','CBA']

(Only 'CAB' is a real word)

wordList holds about 56,000 words imported from a text file. These are all found in the English dictionary and sorted by length and then alphabetically.

isRealWord(comboList,wordList) is my function to test which words in comboList are real by checking if it is in the wordList. Here's the code:

def isRealWord(comboList, wordList):
    print 'Debug 1'
    for combo in comboList:
        print 'Debug 2'
        if combo in wordList:
           print 'Debug 3'
           print combo
           listOfActualWords.append(combo)
    print 'Debug 4'

This is the output:

run c:/Users/uzair/Documents/Programming/Python/unscramble.py
Please give a string of scrambled letters to unscramble: abc 
['A', 'B', 'C'] 
['ABC', 'ACB', 'BAC', 'BCA', 'CAB', 'CBA'] 
Loading word list... 
55909 words loaded 
Debug 1 
Debug 2 
Debug 2 
Debug 2 
Debug 2 
Debug 2 
Debug 2 
Debug 4 
[]

Why is if combo in wordList not returning True and how do I fix it?